My best guess is ~16 MPG out and ~22 MPG back, based on the 5th wheel trailer data. This setup is 2000 pounds lighter and 30" shorter, and 17" narrower up front and at the top. The car trailer fenders hang out there at 8'6" which is a drag, pun intended.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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